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300807 — COVER,JUNCTION BOX

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

300807: COVER,JUNCTION BOX.

The COVER,JUNCTION BOX is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1212 OVERALL EXCEPT INSERT, nut_style: HEXAGON, nut_height: 0.329 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 2B, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-850-7027, 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
300807
NSN: 5310-00-850-7027
NIINs: 008507027, 012141272
FSC: 5310 — Nuts and Washers
CAGE: 26337 — PARKER-HANNIFIN CORPORATION DIV HYDRAULIC ACCUMULATOR DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP 1212 OVERALL EXCEPT INSERT
nut_styleHEXAGON
nut_height0.329 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT MAXIMUM DEGF
thread_class2B
thread_seriesUNF
hardness_rating68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
width_across_flats0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
nominal_thread_size0.312 INCHES IN
bearing_surface_typeFLAT
NSN5310-00-850-7027
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 300807 · 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: 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
TEMP RATING: 250.0 FAHRENHEIT MAXIMUM DEGF
•
SUPPLEMENTARY FEATURES: MFR 11757 PT LIST 811 SERIES ITEM 16 FOR P/N 1438 PUMP
•
HARDNESS RATING: 68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-F-25027,ZYTEL 101 RED MIL SPEC SINGLE MATERIAL RESPONSE LOCKING INSERT
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
THREAD SERIESUNF
TEMP RATING250.0 FAHRENHEIT MAXIMUM DEGF
SUPPLEMENTARY FEATURESMFR 11757 PT LIST 811 SERIES ITEM 16 FOR P/N 1438 PUMP
HARDNESS RATING68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-F-25027,ZYTEL 101 RED MIL SPEC SINGLE MATERIAL RESPONSE LOCKING INSERT
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J403 UNS G12120 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5010 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A563 GRADE A UNS K05802 ASSN STD SINGLE MATERIAL RESPONSE OVERALL EXCEPT INSERT
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.312 INCHES IN
SPECIFICATION/STANDARD DATA81349-MIL-N-25027 GOVERNMENT SPECIFICATION AND 24617-214279 MANUFACTURERS STANDARD AND 72962-NM-NE MANUFACTURERS STANDARD
SUBSTITUTES & CROSS-REFERENCES 5
500963-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MIL-N-25027Reference document
Same NSN cross-reference
Reference document — Identification reference
214279Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
13803599Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
29NE-054Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 300807?
300807 is a COVER,JUNCTION BOX.
What parts can replace 300807?
There are 5 known substitutes for 300807: 500963-1, MIL-N-25027, 214279 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 300807?
300807 is cataloged in the U.S. Government catalog under NSN 5310-00-850-7027. 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.