PartsTable
Technical Data Sheet
Download PDF

4051G25 — PIN,TAPERED,PLAIN

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4051G25: PIN,TAPERED,PLAIN.

The PIN,TAPERED,PLAIN is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 4145 OR STEEL OVERALL, surface_finish: 32.0 MICROINCHES OUTSIDE DIAMETER, first_end_style: OVAL, second_end_style: SQUARE, special_features: 0.500-13 UNC 2 THREAD IN LARGE END 0.620 IN. NOM.

DP WITH 0.560 IN. NOM DIA COUNTERSINK 90.0 DEGREE,ON AXIAL CENTER IN, first_end_location: LONG END. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-290-8873, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
4051G25
NSN: 5315-01-290-8873
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 17454 — TIMKEN GEARS & SERVICES INC. DIV PHILADELPHIA GEAR (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 4145 OR STEEL OVERALL
surface_finish32.0 MICROINCHES OUTSIDE DIAMETER
first_end_styleOVAL
second_end_styleSQUARE
special_features0.500-13 UNC 2 THREAD IN LARGE END 0.620 IN. NOM. DP WITH 0.560 IN. NOM DIA COUNTERSINK 90.0 DEGREE,ON AXIAL CENTER IN
first_end_locationLONG END
pin_overall_length1.009 INCHES MINIMUM AND 1.149 INCHES MAXIMUM IN
pin_size_designation12
first_end_outer_radius1.020 INCHES NOMINAL IN
material_document_and_classificationAISI ASSN STD 1ST MATERIAL RESPONSE OR AISI ASSN STD 2ND MATERIAL RESPONSE OR AISI ASSN STD 3RD MATERIAL RESPONSE OR B5F4H,CAGEC 03502 MFR REF 4TH MATERIAL RESPONSE OVERALL
second_end_relationship_with_first_endNOT IDENTICAL
NSN5315-01-290-8873
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4051G25 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE FINISH: 32.0 MICROINCHES OUTSIDE DIAMETER
•
FIRST END LOCATION: LONG END
•
FIRST END STYLE: OVAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD 1ST MATERIAL RESPONSE OR AISI ASSN STD 2ND MATERIAL RESPONSE OR AISI ASSN STD 3RD MATERIAL RESPONSE OR B5F4H,CAGEC 03502 MFR REF 4TH MATERIAL RESPONSE OVERALL
•
PIN OVERALL LENGTH: 1.009 INCHES MINIMUM AND 1.149 INCHES MAXIMUM IN
•
SECOND END RELATIONSHIP WITH FIRST END: NOT IDENTICAL
•
PIN SIZE DESIGNATION: 12
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES OUTSIDE DIAMETER
FIRST END LOCATIONLONG END
FIRST END STYLEOVAL
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD 1ST MATERIAL RESPONSE OR AISI ASSN STD 2ND MATERIAL RESPONSE OR AISI ASSN STD 3RD MATERIAL RESPONSE OR B5F4H,CAGEC 03502 MFR REF 4TH MATERIAL RESPONSE OVERALL
PIN OVERALL LENGTH1.009 INCHES MINIMUM AND 1.149 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST ENDNOT IDENTICAL
PIN SIZE DESIGNATION12
SPECIAL FEATURES0.500-13 UNC 2 THREAD IN LARGE END 0.620 IN. NOM. DP WITH 0.560 IN. NOM DIA COUNTERSINK 90.0 DEGREE,ON AXIAL CENTER IN
SECOND END STYLESQUARE
MATERIALSTEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 4145 OR STEEL OVERALL
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES 1
6671010-048Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 4051G25?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 4051G25?
4051G25 is a PIN,TAPERED,PLAIN.
What parts can replace 4051G25?
There is 1 known substitute for 4051G25: 6671010-048. Substitute compatibility should be verified for your specific system.
What is the NSN for 4051G25?
4051G25 is cataloged in the U.S. Government catalog under NSN 5315-01-290-8873. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 4051G25

✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.