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MS51838-190 — PIN,STRAIGHT,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MS51838-190: PIN,STRAIGHT,HEADLESS.

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1090 OR STEEL COMP 1095 OR STEEL COMP 50100 OR STEEL COMP W112 OVERALL, surface_finish: 125.0 MICROINCHES OVERALL, first_end_style: SQUARE, pin_overall_length: 0.738 INCHES MINIMUM AND 0.762 INCHES MAXIMUM IN, pin_overall_diameter: 0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN, second_end_relationship_with_first_end: IDENTICAL. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-045-9723, 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
MS51838-190
NSN: 5315-01-045-9723
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 1090 OR STEEL COMP 1095 OR STEEL COMP 50100 OR STEEL COMP W112 OVERALL
surface_finish125.0 MICROINCHES OVERALL
first_end_styleSQUARE
pin_overall_length0.738 INCHES MINIMUM AND 0.762 INCHES MAXIMUM IN
pin_overall_diameter0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
material_document_and_classificationASTM A686 ASSN STD 1ST MATERIAL RESPONSE OR 66 FED STD 2ND MATERIAL RESPONSE OR 66 FED STD 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE OVERALL
second_end_relationship_with_first_endIDENTICAL
NSN5315-01-045-9723
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS51838-190 · 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: 125.0 MICROINCHES OVERALL
•
FIRST END STYLE: SQUARE
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A686 ASSN STD 1ST MATERIAL RESPONSE OR 66 FED STD 2ND MATERIAL RESPONSE OR 66 FED STD 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE OVERALL
•
PIN OVERALL DIAMETER: 0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
•
PIN OVERALL LENGTH: 0.738 INCHES MINIMUM AND 0.762 INCHES MAXIMUM IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
MATERIAL: STEEL COMP 1090 OR STEEL COMP 1095 OR STEEL COMP 50100 OR STEEL COMP W112 OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES OVERALL
FIRST END STYLESQUARE
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A686 ASSN STD 1ST MATERIAL RESPONSE OR 66 FED STD 2ND MATERIAL RESPONSE OR 66 FED STD 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE OVERALL
PIN OVERALL DIAMETER0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
PIN OVERALL LENGTH0.738 INCHES MINIMUM AND 0.762 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
MATERIALSTEEL COMP 1090 OR STEEL COMP 1095 OR STEEL COMP 50100 OR STEEL COMP W112 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
XX003-2117Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS51838-190?
MS51838-190 is a PIN,STRAIGHT,HEADLESS.
What parts can replace MS51838-190?
There is 1 known substitute for MS51838-190: XX003-2117. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51838-190?
MS51838-190 is cataloged in the U.S. Government catalog under NSN 5315-01-045-9723. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.