The Pin,straight,headless, cataloged under National Stock Number 5315-01-318-9172, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is Master Machine Inc. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-318-9172 |
| Primary Part Number | 2121951 |
| Item Name | Pin,straight,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Master Machine Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES OUTSIDE DIAMETER |
| Surface Treatment Document and Classification | QQ-P-35,TY 1,2,3 OR 4 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| First End Style | SQUARE |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pin Overall Diameter | 0.8710 INCHES MINIMUM AND 0.8720 INCHES MAXIMUM IN |
| Pin Overall Length | 10.375 INCHES NOMINAL IN |
| Second End Relationship with First End | IDENTICAL |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 304 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2121951 PRIMARY | Master Machine Inc (USA) |
| 2121951 | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| 2121951 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 5315PL0921938 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5315-01-318-9172 is a Pin,straight,headless, manufactured by Master Machine Inc, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-318-9172 has 2 manufacturer part numbers on file: 2121951 (Master Machine Inc), 2121951 (Bae Systems Land & Armaments L.p.).
Key specifications for 2121951: Surface Finish: 32.0 MICROINCHES OUTSIDE DIAMETER; Surface Treatment Document and Classification: QQ-P-35,TY 1,2,3 OR 4 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; First End Style: SQUARE; Material Document and Classification: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 9 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.