Model: MIL-S-7839

Machine Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.369 inches
Fastener Length
Between 0.765 inches and 0.797 inches
Head Style
Flat countersunk
Head Diameter
Between 0.283 inches and 0.332 inches
Internal Drive Style
Cross recess type iii
Thread Diameter
0.164 inches
Thready Qty Per Inch (tpi)
32
Min. Tensile Strength (psi)
125000 pounds per square inch
Hardness Rating
Between 26.0 rockwell c and 32.0 rockwell c
Countersink Angle
Between 99.0 degrees and 101.0 degrees
Screw Material
Steel comp 8740 or steel comp 8630
Screw Material Specification
Mil-s-60049 military specification 1st material response or mils-6050 military specification 2nd material response
Screw Surface Treatment
Cadmium and chromate
Screw Surface Treatment Specification
Qq-p-416, type 2, class 2 federal specification all treatment responses
Thread Series Designator
Unc
NSN
5305-00-156-2359
Part Number
MIL-S-7839
Description
Screw,machine
CAGE
80205

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

Part MIL-S-7839 NSN 5305-00-156-2359

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
06657
FIIG:
A500D0
Concept No.:
App. Key:
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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