The Tester,material Hardness, cataloged under National Stock Number 6635-00-663-4576, is classified within Federal Supply Class 6635 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Sun Tec Corp. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 6635-00-663-4576 |
| Primary Part Number | 12B |
| Item Name | Tester,material Hardness |
| FSC / FSG | 6635 / 66 — No Item Name Available |
| Manufacturer | Sun Tec Corp |
| Status | CANCELLED |
| Type/model Designation | OUR |
| Relationship to Similar Equipment | OUR IS REGULAR MODEL; OUS SUPERFICIAL MODEL 6635-00-509-5238 MAKES SMALLER INDENTATIONS |
| Indicator Reading Type | MULTIPLE |
| Vertical Capacity | 12.000 INCHES IN |
| Indicator Type | CIRCULAR DIAL |
| Installation Design | BENCH |
| Test Type | ROCKWELL |
| Functional Classification | AA-8.6 |
| Unpackaged Unit Weight | 100.000 POUNDS LBS |
| Indicator Design | CONVERSION CHART |
| Usage Design | EXTERNAL |
| Functional Description | 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 |
| Entry Date | 70-08-15 |
| Accessory Components and Quantity | 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 KG |
| Reference Data and Literature | TM 55-405-10 AND ROCKWELL HARDNESS TESTER BOOK |
| Carrying Case | NOT PROVIDED |
| Horizontal Reach | 5.500 INCHES IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 12B PRIMARY | Sun Tec Corp (USA) |
| 12B | Service Diamond Tool Company Dba Service Physical Testers Div Div Service Physical Testers (USA) |
| 4OUR | Page-Wilson Corp Measurement Systems (USA) |
| C12A | The Clark-Eliance Corp (USA) |
| 4-OUR | Page-Wilson Corp Measurement Systems (USA) |
NSN 6635-00-663-4576 is a Tester,material Hardness, manufactured by Sun Tec Corp, classified under FSC 6635 (No Item Name Available). Status: cancelled.
NSN 6635-00-663-4576 has 5 cross-referenced part numbers: 12B (Sun Tec Corp), 12B (Service Diamond Tool Company Dba Service Physical Testers Div Div Service Physical Testers), 4OUR (Page-Wilson Corp Measurement Systems), C12A (The Clark-Eliance Corp), 4-OUR (Page-Wilson Corp Measurement Systems).
There are 12 known substitutes for 6635-00-663-4576: 3441-00-009-2848, 3110-00-156-1750, 5935-00-192-4789 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 12B: Type/model Designation: OUR; Relationship to Similar Equipment: OUR IS REGULAR MODEL; OUS SUPERFICIAL MODEL 6635-00-509-5238 MAKES SMALLER INDENTATIONS; Indicator Reading Type: MULTIPLE; Vertical Capacity: 12.000 INCHES IN. 17 total characteristics are documented in the Federal Logistics Information System.
NSN 6635-00-663-4576 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.