The Ring,retaining, cataloged under National Stock Number 5325-01-276-1025, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Rotor Clip Company, Inc.. Government technical data includes 10 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-276-1025 |
| Primary Part Number | 4100-177-ST-ZD |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Rotor Clip Company, Inc. |
| Status | ACTIVE |
| Material Hardness Rating | 47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM |
| Usage Design | EXTERNAL |
| Material Document and Classification | SAE 1060 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1064 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1065 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1070 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1074 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1078 ASSN STD 6TH MATERIAL RESPONSE OR SAE 1080 ASSN STD 7TH MATERIAL RESPONSE OR SAE 1084 ASSN STD 8TH MATERIAL RESPONSE OR SAE 1085 ASSN STD 9TH MATERIAL RESPONSE OR SAE 1086 ASSN STD 10TH MATERIAL RESPONSE OR SAE 1090 ASSN STD 11TH MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Major Thickness | 0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| Inside Diameter | 1.617 INCHES MINIMUM AND 1.650 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | EXTERNAL INVERTED LUGS |
| Surface Treatment | ZINC AND CHROMATE |
| Material | STEEL COMP 1060 OR STEEL COMP 1064 OR STEEL COMP 1065 OR STEEL COMP 1070 OR STEEL COMP 1074 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1085 OR STEEL COMP 1086 OR STEEL COMP 1090 |
| 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 |
|---|---|
| 4100-177-ST-ZD PRIMARY | Rotor Clip Company, Inc. (USA) |
| 5108-177-SZD-B PRIMARY | Rotor Clip Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 14721200-1 PIECE | 5/9 Secondary reference Gulf Coast Holdings, Inc Dba Unidynamics |
| 14721200-1 PIECE 38 | 5/9 Secondary reference U.S. Government activity |
| 14721200-1 PIECE | 5/2 Secondary reference U.S. Government activity |
| 4100-177-ST-ZD | 5/9 Secondary reference U.S. Government activity |
| 5108-177-SZD-B | 5/9 Secondary reference Truarc Company Llc Dba Waldes Truarc |
NSN 5325-01-276-1025 is a Ring,retaining, manufactured by Rotor Clip Company, Inc., classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-276-1025 has 2 manufacturer part numbers on file: 4100-177-ST-ZD (Rotor Clip Company, Inc.), 5108-177-SZD-B (Rotor Clip Company, Inc.).
Key specifications for 4100-177-ST-ZD: Material Hardness Rating: 47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM; Usage Design: EXTERNAL; Material Document and Classification: SAE 1060 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1064 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1065 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1070 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1074 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1078 ASSN STD 6TH MATERIAL RESPONSE OR SAE 1080 ASSN STD 7TH MATERIAL RESPONSE OR SAE 1084 ASSN STD 8TH MATERIAL RESPONSE OR SAE 1085 ASSN STD 9TH MATERIAL RESPONSE OR SAE 1086 ASSN STD 10TH MATERIAL RESPONSE OR SAE 1090 ASSN STD 11TH MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR. 10 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.