Acquisition method (AMC)
3
FSC 6635 × TESTER,MATERIAL HARDNESS
TESTER,MATERIAL HARDNESS
6635-00-663-4576 FSC 6635
NSN 6635-00-663-4576 (also written 6635006634576; NIIN 00-663-4576) is a tester, material hardness in Federal Supply Class 6635, Physical Properties Testing and Inspection Equipment. 5 manufacturer part numbers from 4 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-1839 | 1 | Closes in 1d | Bid → |
Can you win it?
This item is coded to be bought directly from the actual manufacturer (AMC 3).
Suffix (AMSC)
D
Competition
Coded for a named source
AMC 3: buy directly from the actual manufacturer, second or later time. AMSC D: the data needed to compete the part is unavailable or cannot be obtained economically. 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.
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 |
|---|---|
| INDICATOR READING TYPE BCKW | MULTIPLE |
| VERTICAL CAPACITY BCKS | INCHES 12.000 |
| HORIZONTAL REACH BCKT | INCHES 5.500 |
| ENTRY DATE NTRD | 70-08-15 |
| REFERENCE DATA AND LITERATURE RDAL | TM 55-405-10 AND ROCKWELL HARDNESS TESTER BOOK |
| INDICATOR DESIGN BCKX | CONVERSION CHART |
| TYPE/MODEL DESIGNATION TMDN | OUR |
| UNPACKAGED UNIT WEIGHT CTJS | POUNDS MAXIMUM 100.000 |
| FUNCTIONAL CLASSIFICATION FCLS | AA-8.6 |
| TEST TYPE AQYF | ROCKWELL |
| ACCESSORY COMPONENTS AND QUANTITY AKYD | ANVIL,FLAT,APPROXIMATELY 2.500 IN. DIA 1; ANVIL,RAISED SPOT 1; ANVIL,RAISED V,FOR SMALL DIA WORK 1; ANVIL,V,FOR 0.250 IN. TO 5.000 IN. DIA STOCK 1; CHUCK,0.062 IN. STEEL BALL PENETRATOR W/50 BALLS 1; COVER,TELESCOPIC ELEVATING SCREW 1; COVER,VINYL PLASTIC 1; PENETRATOR,DIAMOND C SCALE 1; WEIGHTS,FOR APPLYING 60 KG,100 KG,150 KG MAJOR LOADS 1 SET; TABLE,TESTING,8 IN. DIA 1; TEST BLOCKS FOR B SCALE 2; TEST BLOCKS FOR C SCALE 2 |
| USAGE DESIGN ALBY | EXTERNAL |
| INDICATOR TYPE AMKD | CIRCULAR DIAL |
| INSTALLATION DESIGN AMQY | BENCH |
| RELATIONSHIP TO SIMILAR EQUIPMENT RTSE | OUR IS REGULAR MODEL; OUS SUPERFICIAL MODEL 6635-00-509-5238 MAKES SMALLER INDENTATIONS |
| FUNCTIONAL DESCRIPTION FTLD | BALL-CHECK DETERMINES HARDNESS OF RELATIVELY SOFT MATL; SPHERE-CONICAL DIAMOND PENETRATOR (BRALE) TESTS HARDER MATL SUCH AS TOOL OR SPRING STEEL; MEAS DP PENETRATION OF BALL OR BRALE CHECK; READINGS REFER TO RELATIONSHIP TABLE FOR TS OF MATL |
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 |
|---|---|---|
| 12B | 1G0P4 | SUN TEC CORP |
| 12B | 31060 | SERVICE DIAMOND TOOL COMPANY DBA SERVICE PHYSICAL TESTERS DIV DIV SERVICE PHYSICAL TESTERS |
| 4-OUR | 82729 | PAGE-WILSON CORP MEASUREMENT SYSTEMS |
| 4OUR | 82729 | PAGE-WILSON CORP MEASUREMENT SYSTEMS |
| C12A | 12665 | THE CLARK-ELIANCE 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
—
Purchases
0
Total spend
—
—
Last purchased
—
Purchase records
—
Total demand
—
Latest award total
Purchase history
No priced purchases on record for this NSN yet.
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.
No related contract actions on record.
Demand history
Every solicitation we've indexed for this NSN, open and closed — 1 on record. Closed RFQs (expired, cancelled, or awarded) stay here as a record of past demand; they never get removed.
| Solicitation | Issued | Closes / closed | Qty | Status | |
|---|---|---|---|---|---|
| SPE4A6-27-T-1839 | Oct 13, 2026 | Oct 20, 2026 | 1 | Open | 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 13, 2026.
- Contract action totals: USAspending, context only.
- Full methodology →
Cite this page
Citation
NSN Explorer. "TESTER,MATERIAL HARDNESS." nsnexplorer.com, https://nsnexplorer.com/nsn/6635-00-663-4576/. Data as of October 19, 2026.
Link
https://nsnexplorer.com/nsn/6635-00-663-4576/