The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-448-2639, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-448-2639 |
| Primary Part Number | CTS112A-4-0 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Shank Diameter | 0.5010 INCHES MINIMUM AND 0.5020 INCHES MAXIMUM IN |
| Second Shank Diameter | 0.4994 INCHES MINIMUM AND 0.4999 INCHES MAXIMUM IN |
| Undercut Width | 0.032 INCHES NOMINAL IN |
| First End Location | SQUARE END |
| Surface Treatment Document and Classification | MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| First End Style | SQUARE |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 68.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | UNDERCUT |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Second End Relationship with First End | NOT IDENTICAL |
| Surface Treatment | OXIDE OVERALL |
| Material | STEEL COMP 1113 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 |
|---|---|
| CTS112A-4-0 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| RE168350004-138 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 5315-01-448-2639 is a Pin,shoulder,headless, manufactured by The Boeing Company Div Defense, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-448-2639 has 1 manufacturer part number on file: CTS112A-4-0 (The Boeing Company Div Defense).
Key specifications for CTS112A-4-0: Shank Diameter: 0.5010 INCHES MINIMUM AND 0.5020 INCHES MAXIMUM IN; Second Shank Diameter: 0.4994 INCHES MINIMUM AND 0.4999 INCHES MAXIMUM IN; Undercut Width: 0.032 INCHES NOMINAL IN; First End Location: SQUARE END. 12 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.