The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-166-2608, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Nylok Llc. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-166-2608 |
| Primary Part Number | P37CRBM2.5X.48R6MME |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Nylok Llc |
| Status | ACTIVE |
| Head Height | 1.840 MILLIMETERS MINIMUM AND 1.860 MILLIMETERS MAXIMUM MM |
| External Thread Tolerance Class | 4H6H |
| Fastener Length | 7.850 MILLIMETERS NOMINAL MM |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Pitch in Millimeters | 0.48 |
| Thread Length | 5.500 MILLIMETERS MINIMUM AND 6.000 MILLIMETERS MAXIMUM MM |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 2.5 MILLIMETERS MM |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PATCH THREADS |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Material | STEEL OVERALL |
| Thread Series Designator | M |
| Head Diameter | 4.600 MILLIMETERS MINIMUM AND 4.900 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| P37CRBM2.5X.48R6MME PRIMARY | Nylok Llc (USA) |
| Reference | Meaning |
|---|---|
| 13031342 | 7/2 Vendor item drawing reference Us Army Aviation and Missile Command |
| P37CRBM2.5X.48R6MME | 5/9 Secondary reference Nylok Llc |
NSN 5305-01-166-2608 is a Screw,cap,socket Head, manufactured by Nylok Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-166-2608 has 1 manufacturer part number on file: P37CRBM2.5X.48R6MME (Nylok Llc).
Key specifications for P37CRBM2.5X.48R6MME: Head Height: 1.840 MILLIMETERS MINIMUM AND 1.860 MILLIMETERS MAXIMUM MM; External Thread Tolerance Class: 4H6H; Fastener Length: 7.850 MILLIMETERS NOMINAL MM; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 16 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.