Acquisition method (AMC)
1
FSC 5310 × NUT,SELF-LOCKING,DOUBLE HEXAGON
NUT,SELF-LOCKING,DOUBLE HEXAGON
5310-00-055-2350 FSC 5310
NSN 5310-00-055-2350 (also written 5310000552350; NIIN 00-055-2350) is a nut, self-locking, double hexagon in Federal Supply Class 5310, Nuts and Washers. 11 manufacturer part numbers from 9 suppliers are on record. The government has 1 open solicitation for it.
Open for bid
1 open solicitation on record right now — quantity, close date, and where to submit.
| Solicitation | Qty | Status | |
|---|---|---|---|
| SPE4A6-27-T-8030 | 332 | Closes in 3d | Bid → |
Can you win it?
This item is coded as suitable for competitive acquisition (AMC 1).
Suffix (AMSC)
C
Competition
Coded for competition
AMC 1: suitable for competitive acquisition, second or later time. AMSC C: needs engineering source approval; other sources must qualify first. The codes describe the item's status on record, not any one solicitation. What the codes mean
What it is — can you make it?
Dimensions, the FLIS specification requirements, and the manufacturer part numbers already qualified against this NSN.
Dimensioned drawing
Generated from the federal catalog's dimensional data for this NSN — reference only, not a manufacturing drawing.
Specifications
From the federal catalog (DLA FLIS / PUB LOG) — what your part has to meet. Cited specification documents can be looked up in ASSIST Quick Search ↗, DoD's public spec repository — copy the document number in.
| Requirement | Value |
|---|---|
| THREAD CLASS AAJD | 3B |
| THREAD DIRECTION AAJF | RIGHT-HAND |
| LOCKING FEATURE AAUM | PREVAILING TORQUE ALL METAL DESIGN |
| HARDNESS RATING CQFM | ROCKWELL C MINIMUM 38.0 AND ROCKWELL C MAXIMUM 45.0 |
| NOMINAL THREAD SIZE CQJX | INCHES 0.375 |
| BEARING SURFACE TYPE CRTM | CHAMFERED |
| SPECIAL FEATURES FEAT | ACTION ID 45588301 |
| MATERIAL MATT | OVERALL STEEL COMP 8630 OR STEEL COMP 4037 OR STEEL COMP 601 |
| MATERIAL DOCUMENT AND CLASSIFICATION MDCL | OVERALL ASSN STD 1ST MATERIAL RESPONSE A-S 6280 OR ASSN STD 2ND MATERIAL RESPONSE A-S 6300 OR ASSN STD 3RD MATERIAL RESPONSE A-S 6304 |
| SURFACE TREATMENT SFTT | OVERALL CADMIUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION STDC | OVERALL FED SPEC SINGLE TREATMENT RESPONSE QQ--416,TY 1,CL 1 QQ--416 |
| THREAD SERIES BZRR | UNF |
| THREAD QUANTITY PER INCH CMLP | 24 |
| WIDTH ACROSS FLATS ASDB | INCHES MINIMUM 0.553 AND INCHES MAXIMUM 0.564 |
| TEMP RATING AZKQ | FAHRENHEIT NOMINAL 500.0 |
| NUT STYLE ACTA | — |
| NUT HEIGHT ADEA | INCHES MINIMUM 0.303 AND INCHES MAXIMUM 0.313 |
Manufacturer part numbers
Commercial part numbers cross-referenced to this NSN in the federal catalog — the parts that have been accepted as satisfying this stock number, and who makes them.
| Part number | CAGE | Manufacturer |
|---|---|---|
| 090138-01 | 89305 | SIMMONDS PRECISION PRODUCTS INC |
| 5310PL1935160 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX |
| EWSN26-6 | 56878 | SPS TECHNOLOGIES, LLC DBA PB FASTENERS |
| EWSN26-6 | A0126 | LEONARDO SPA HELICOPTERS DIVISION - PRODUCTION SITE |
| EWSN26AG-06 | 56878 | SPS TECHNOLOGIES, LLC DBA PB FASTENERS |
| LH6521-064 | 57983 | GREER AERO LLC |
| LH6521-064 | 62554 | ALCOA GLOBAL FASTENERS, INC DBA SIMMONDS MECAERO FAS PDTS DIV SIMMONDS MECAERO FAS PDTS |
| LH6521-064 | 72962 | HARVARD INDUSTRIES INC |
| SS5086-06 | 27238 | BRISTOL INDUSTRIES, LLC |
| SS5086-06 | 56878 | SPS TECHNOLOGIES, LLC DBA PB FASTENERS |
| SS5086-06 | 78286 | SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP |
What it pays — so you can quote
The government's own price and demand record for this NSN — what past awards cleared at, so you know where to land your quote.
Latest unit price
$6.09
Purchases
1
Total spend
$28,197
Sep 21, 2026
Last purchased
5 · 5.0/yr
Purchase records
$175,151
Total demand
$6.09
Latest unit price
Purchase history
| Awarded | Qty | Unit price | Total | Supplier | Agency | Source |
|---|---|---|---|---|---|---|
| Sep 21, 2026 | 4,630 | $6.09 | $28,197 | BOEING DISTRIBUTION SERVICES X, INC. (2N935) | Unknown | Source ↗ |
Related contract actions
Contract action totals, not unit prices — obligation amounts from USAspending for related awards, shown for context only. These do not appear on the price chart above.
| Action date | Award # | Recipient | Agency | Obligation |
|---|---|---|---|---|
| Aug 6, 2026 | SPE4A026P2301 ↗ | ADEPT FASTENERS INC | — | $56,220 |
| Sep 17, 2026 | SPE4A026P2647 ↗ | ADEPT FASTENERS INC | — | $42,154 |
| Sep 21, 2026 | SPE4A626P0U31 ↗ | AERO-GLEN INTERNATIONAL LLC | — | $20,383 |
| Sep 21, 2026 | SPE4A626P0W09 ↗ | BOEING DISTRIBUTION SERVICES X, INC. | — | $28,197 |
Demand history
Every solicitation we've indexed for this NSN, open and closed — 9 on record. Closed RFQs (expired, cancelled, or awarded) stay here as a record of past demand; they never get removed.
Buying rhythm
How often does the government buy this item, and how long since the last time? Every solicitation and award on one line.
- Solicitation posted
- Award made
Dot size shows quantity. A faint bar joins a solicitation to the award made against it.
Who wins this item
Does one supplier win this every time, and are the winners on the listed-source list? One dot per award.
- Award in the last 2 years
- Older award
BOEING DISTRIBUTION SERVICES X, INC.
last award Sep 2026
ALCOA GLOBAL FASTENERS, INC DBA SIMMONDS MECAERO FAS PDTS DIV SIMMONDS MECAERO FAS PDTS
no award yet
no awards on record
Listed source BRISTOL INDUSTRIES, LLC
no award yet
no awards on record
Listed source GREER AERO LLC
no award yet
no awards on record
Listed source HARVARD INDUSTRIES INC
no award yet
no awards on record
Listed source JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX
no award yet
no awards on record
Listed source LEONARDO SPA HELICOPTERS DIVISION - PRODUCTION SITE
no award yet
no awards on record
Listed source SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP
no award yet
no awards on record
Listed source BOEING DISTRIBUTION SERVICES X, INC. won the only award on record. BOEING DISTRIBUTION SERVICES X, INC. won without being a listed source.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE4A6-27-T-8030 | Nov 3, 2026 | Nov 10, 2026 | 332 | Open | View at DIBBS → |
| SPE4A6-26-T-34YP | Sep 23, 2026 | Sep 30, 2026 | 554 | Expired | View at DIBBS → |
| SPE4A6-26-T-26XJ | Sep 8, 2026 | Sep 15, 2026 | 2 | Expired | View at DIBBS → |
| SPE4A6-26-T-25YW | Sep 3, 2026 | Sep 10, 2026 | 4,630 | Expired | View at DIBBS → |
| SPE4A6-26-T-23DE | Aug 27, 2026 | Sep 3, 2026 | 11 | Expired | View at DIBBS → |
| SPE4A6-26-T-23QW | Aug 27, 2026 | Sep 3, 2026 | 60 | Expired | View at DIBBS → |
| SPE4A6-26-T-23QZ | Aug 27, 2026 | Sep 3, 2026 | 200 | Expired | View at DIBBS → |
| SPE4A6-26-T-16BK | Aug 13, 2026 | Aug 20, 2026 | 7,069 | Expired | View at DIBBS → |
| SPE4A6-26-T-11PQ | Aug 5, 2026 | Aug 12, 2026 | 7,069 | Cancelled | View at DIBBS → |
Open RFQs on DIBBS → DIBBS award history ↗
About this data
- Unit prices: DLA DIBBS award records — every row links to its government record.
- AMSC: latest observed value from DIBBS solicitation history as of Oct 10, 2026.
- Contract action totals: USAspending, context only.
- Data last refreshed: 2026-11-06.
- Full methodology →
Cite this page
Citation
NSN Explorer. "NUT,SELF-LOCKING,DOUBLE HEXAGON." nsnexplorer.com, https://nsnexplorer.com/nsn/5310-00-055-2350/. Data as of November 7, 2026.
Link
https://nsnexplorer.com/nsn/5310-00-055-2350/