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50310-1 — VALVE,CHECK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

50310-1: VALVE,CHECK.

The VALVE,CHECK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.178 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN, hardness_rating: 78.0 ROCKWELL B MINIMUM, thread_direction: RIGHT-HAND, width_across_flats: 0.423 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-050-3101, 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
50310-1
NSN: 5310-00-050-3101
NIINs: 000503101, 015866157
FSC: 5310 — Nuts and Washers
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.178 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
hardness_rating78.0 ROCKWELL B MINIMUM
thread_directionRIGHT-HAND
width_across_flats0.423 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
bearing_surface_typeCHAMFERED OR WASHER FACED
NSN5310-00-050-3101
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 50310-1 · 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
•
WIDTH ACROSS FLATS: 0.423 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
•
HARDNESS RATING: 78.0 ROCKWELL B MINIMUM
•
THREAD DIRECTION: RIGHT-HAND
•
NUT HEIGHT: 0.178 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
•
MATERIAL: STEEL OVERALL
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.423 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
HARDNESS RATING78.0 ROCKWELL B MINIMUM
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.178 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
NUT STYLEHEXAGON
MATERIALSTEEL OVERALL
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 50310-1?
50310-1 is a VALVE,CHECK.
What is the NSN for 50310-1?
50310-1 is cataloged in the U.S. Government catalog under NSN 5310-00-050-3101. 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.